CVE-2026-7663: CWE-285 Improper Authorization in IBM Langflow OSS
IBM Langflow OSS 1.0.0 through 1.9.6 could allow unauthenticated attackers to access protected MCP project resources and execute MCP operations due to improper authorization enforcement in the Streamable MCP transport endpoint.
AI Analysis
Technical Summary
CVE-2026-7663 is an improper authorization vulnerability (CWE-285) affecting IBM Langflow OSS versions 1.0.0 through 1.9.6. The issue arises from insufficient authorization enforcement in the Streamable MCP transport endpoint, enabling unauthenticated attackers to access and execute operations on protected MCP project resources. The vulnerability has a CVSS 3.1 base score of 9.1, reflecting network attack vector, no privileges required, no user interaction, and high confidentiality and integrity impact. No vendor advisory or patch information is available at this time.
Potential Impact
Successful exploitation allows unauthenticated attackers to access sensitive MCP project resources and execute MCP operations, leading to a complete compromise of confidentiality and integrity of those resources. Availability impact is not indicated. The critical CVSS score (9.1) underscores the severity of the vulnerability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict network access to the Streamable MCP transport endpoint to trusted users and networks where possible to reduce exposure.
CVE-2026-7663: CWE-285 Improper Authorization in IBM Langflow OSS
Description
IBM Langflow OSS 1.0.0 through 1.9.6 could allow unauthenticated attackers to access protected MCP project resources and execute MCP operations due to improper authorization enforcement in the Streamable MCP transport endpoint.
CVSS v3.1
Score 9.1critical
Affected software
pkg:github/ibm/langflow_osscpe:2.3:a:ibm:langflow_oss:1.0.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:langflow_oss:1.9.6:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-7663 is an improper authorization vulnerability (CWE-285) affecting IBM Langflow OSS versions 1.0.0 through 1.9.6. The issue arises from insufficient authorization enforcement in the Streamable MCP transport endpoint, enabling unauthenticated attackers to access and execute operations on protected MCP project resources. The vulnerability has a CVSS 3.1 base score of 9.1, reflecting network attack vector, no privileges required, no user interaction, and high confidentiality and integrity impact. No vendor advisory or patch information is available at this time.
Potential Impact
Successful exploitation allows unauthenticated attackers to access sensitive MCP project resources and execute MCP operations, leading to a complete compromise of confidentiality and integrity of those resources. Availability impact is not indicated. The critical CVSS score (9.1) underscores the severity of the vulnerability.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict network access to the Streamable MCP transport endpoint to trusted users and networks where possible to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-05-01T19:43:15.220Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a441ac027e9c7971948ab65
Added to database: 06/30/2026, 19:36:32 UTC
Last enriched: 06/30/2026, 19:51:38 UTC
Last updated: 07/01/2026, 01:34:34 UTC
Views: 10
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.